<!DOCTYPE html>
<html>
    <head>
        <meta charset="utf-8">
        <title>自定义函数</title>
        <script src="scripts/common.js"></script>
        <script>       
           
            //2.调用自定义函数
            console.log(add(3,7));
            console.log(add(5,12));
            console.log(typeof(add));
        </script>
    </head>
    <body>
    </body>
</html>



